WideStudio is an Integrated Development Environment (IDE) for building window applications in C++, Ruby, Python an Perl for Windows, MacOSX, Linux, FreeBSD, SOLARIS and other unix and BTRON and T-Engine. This is open and free (under MIT/X Consortiun Lice

Generic Collectible Card Game is a multiplayer multiplatform implementation of a card game engine. The card game engine is designed to be of general purpose core for several modules each defining the game specific behaviour.